Waste water treatment method and equipment being able to economically treat both a waste water and an exhaust gas respectively containing fluorine and organic matter

Abstract

This waste water treatment equipment introduces granular calcium carbonate mineral 13 , a calcium fluoride 14 in a floc form and a microorganism 15 , which are flowing in a lower section 8 , into an upper section 7 and sprinkles the same. Therefore, in the upper section 7 , the granular calcium carbonate mineral 13 chemically treats fluorine in an exhaust gas, while the calcium fluoride 14 in the floc form chemically treats acid components in the exhaust gas although the effect is little. At the same time, the microorganism 15 biologically treats the organic matter in the exhaust gas. Then, the granular calcium carbonate mineral 13 , the calcium fluoride 14 and the microorganism 15 that have not been utilized for exhaust gas treatment treat again the waste water in the lower section 8 . With this arrangement, the waste water containing organic matter such as fluorine and surfactant and the exhaust gas containing fluorine and organic matter can be concurrently treated, and the initial cost and running cost can be reduced.

What is claimed is:  
     
       1. A waste water treatment method comprising the steps of: 
       flowing a granular calcium carbonate mineral, calcium fluoride in a floc form and a microorganism in a waste water introduced into a lower section, wherein the waste water contains fluorine and organic matter;  
       sprinkling the waste water including the granular calcium carbonate mineral, the calcium fluoride in the floc form and the microorganism over the exhaust gas introduced into an upper section, wherein the exhaust gas contains fluorine and organic matter; and  
       circulating the waste water from the upper section to the lower section and from the lower section to the upper section.  
     
     
       2. A waste water treatment method comprising the steps of: 
       flowing a granular calcium carbonate mineral in a waste water introduced into a lower section, wherein the waste water contains fluorine and organic matter;  
       sprinkling the waste water including the granular calcium carbonate mineral over an exhaust gas introduced into an upper section, wherein the exhaust gas contains fluorine and organic matter; and  
       circulating the waste water from the upper section to the lower section and from the lower section to the upper section, wherein  
       the granular calcium carbonate mineral has a particle diameter of 0.1 millimeter to 2.0 millimeters and the upper section does not have plastic fillers and charcoals for propagation of microorganisms.  
     
     
       3. A waste water treatment method as claimed in claim  1 , wherein 
       the granular calcium carbonate mineral has a particle diameter of 0.1 millimeter to 2.0 millimeters and the upper section does not have plastic fillers and charcoals for propagation of microorganisms.  
     
     
       4. A waste water treatment method comprising the steps of: 
       flowing a granular calcium carbonate mineral in a waste water introduced into a lower section, wherein the waste water contains fluorine and organic matter;  
       sprinkling the waste water including calcium fluoride in a floc form and a microorganism generated in the lower section over an upper section in which a sludge adhesion medium is arranged and an exhaust gas is introduced, wherein the exhaust gas contains fluorine and organic matter; and  
       circulating the waste water from the upper section to the lower section and from the lower section to the upper section.  
     
     
       5. A waste water treatment method as claimed in claim  4 , wherein 
       the sludge adhesion medium is made of a resin and made to have a relatively large surface area and the granular calcium carbonate mineral has a particle diameter of 0.1 millimeter to 2.0 millimeters and the upper section does not have plastic fillers and charcoals for propagation of microorganisms.  
     
     
       6. Waste water treatment equipment comprising: 
       a water tank lower section in which a waste water is introduced from below and a granular calcium carbonate mineral is made to flow in the waste water by a stirring means for stirring the waste water, wherein the waste water contains fluorine and organic matter;  
       a water tank upper section which is arranged above a water level of the waste water in the water tank lower section and in which an exhaust gas is introduced and a sludge adhesion section constructed so as to have a water flowability is provided, wherein the exhaust gas contains fluorine and organic matter;  
       a waste water circulating means for pumping up the waste water from above the water tank lower section into the water tank upper section and sprinkling the pumped-up waste water on the water tank upper section; and  
       an exhaust gas introducing means for introducing an exhaust gas into a space section between the water tank lower section and the water tank upper section.  
     
     
       7. Waste water treatment equipment comprising: 
       a water tank lower section which has a granular calcium carbonate mineral that is stowed so as to flow in an introduced waste water, a stirring means for stirring the waste water and a non-stirring region that is not stirred by this stirring means, wherein the waste water contains fluorine and organic matter;  
       a water tank upper section which is arranged above the water tank lower section and a water level of the waste water introduced into the water tank lower section and which has a sludge adhesion section having an adhesion medium that is constructed so as to have a water flowability;  
       a first waste water circulating means for pumping up the waste water containing calcium fluoride in a floc form and a microorganism from the non-stirring region of the water tank lower section and sprinkling the waste water on the sludge adhesion section of the water tank upper section;  
       a second waste water circulating means for pumping up the waste water containing the calcium carbonate mineral, the calcium fluoride in the floc form and the microorganism from a stirring region of the water tank lower section and sprinkling the waste water on a portion that belongs to the water tank upper section and is other than the sludge adhesion section; and  
       an exhaust gas introducing means for introducing an exhaust gas into a space between the lower section and the upper section, wherein the exhaust gas contains fluorine and organic matter.  
     
     
       8. Waste water treatment equipment as claimed in claim  6 , wherein 
       the stirring means performs stirring by aeration.  
     
     
       9. Waste water treatment equipment as claimed in claim  7 , wherein 
       the stirring means performs stirring by aeration.  
     
     
       10. Waste water treatment equipment comprising: 
       a first water tank and a second water tank,  
       the first water tank in which a waste water is introduced and reserved, the first water tank having a waste water introducing means for introducing a reserved waste water into the second water tank, wherein the waste water contains fluorine and organic matter,  
       the second water tank being the waste water treatment equipment claimed in claim  6 ;  
       a third water tank in which the waste water from the second water tank is introduced, the third water tank having a stirring means for stirring the introduced waste water and receiving an aluminum agent put therein;  
       a fourth water tank in which a macromolecular coagulant is put;  
       a fifth water tank in which the waste water from the fourth water tank is introduced, the fifth water tank performing solid-liquid separation of the waste water and discharging separated supernatant liquid;  
       a sixth water tank in which the sludge formed through precipitation in the fifth water tank is introduced, the sixth water tank condensing the sludge through sedimentation;  
       a dehydrating means for dehydrating the sludge that is condensed in the sixth water tank and introduced into the dehydrating means; and  
       a sludge returning means for returning the sludge precipitated in the fifth water tank or the sludge condensed in the sixth water tank to at least one second water tank and the third water tank.  
     
     
       11. Waste water treatment equipment comprising: 
       a first water tank and a second water tank,  
       the first water tank in which a waste water is introduced and reserved, the first water tank having a waste water introducing means for introducing a reserved waste water into the second water tank, wherein the waste water contains fluorine and organic matter,  
       the second water tank being the waste water treatment equipment claimed in claim  7 ;  
       a third water tank in which the waste water from the second water tank is introduced, the third water tank having a stirring means for stirring the introduced waste water and receiving an aluminum agent put therein;  
       a fourth water tank in which a macromolecular coagulant is put;  
       a fifth water tank in which the waste water from the fourth water tank is introduced, the fifth water tank performing solid-liquid separation of the waste water and discharging separated supernatant liquid;  
       a sixth water tank in which the sludge formed through precipitation in the fifth water tank is introduced, the sixth water tank condensing the sludge through sedimentation;  
       a dehydrating means for dehydrating the sludge that is condensed in the sixth water tank and introduced into the dehydrating means; and  
       a sludge returning means for returning the sludge precipitated in the fifth water tank or the sludge condensed in the sixth water tank to at least one of the second water tank and the third water tank.  
     
     
       12. Waste water treatment equipment as claimed in claim  6 , wherein 
       the granular calcium carbonate mineral has a particle diameter of 0.1 millimeter to 2.0 millimeters and the upper section does not have plastic fillers and charcoals for propagation of microorganisms.  
     
     
       13. Waste water treatment equipment as claimed in claim  7 , wherein 
       the granular calcium carbonate mineral has a particle diameter of 0.1 millimeter to 2.0 millimeters and the upper section does not have plastic fillers and charcoals for propagation of microorganisms.  
     
     
       14. Waste water treatment equipment as claimed in claim  7 , wherein 
       the sludge to be introduced into the sludge adhesion section is sludge including anaerobic microorganic sludge.  
     
     
       15. Waste water treatment equipment as claimed in claim  10 , wherein 
       the sludge to be introduced into the sludge adhesion section is sludge including anaerobic microorganic sludge.  
     
     
       16. Waste water treatment equipment as claimed in claim  10 , wherein 
       the third water tank includes a sludge fixing means for fixing the sludge in the introduced waste water.  
     
     
       17. Waste water treatment equipment as claimed in claim  10 , wherein 
       slaked lime is put into the third water tank.  
     
     
       18. Waste water treatment equipment as claimed in claim  10 , wherein 
       the aluminum agent put in the third water tank is polychlorinated aluminum.  
     
     
       19. Waste water treatment equipment comprising: 
       a water tank lower section in which a waste water is introduced from below and a granular calcium carbonate mineral is made to flow in the waste water by a stirrer for stirring the waste water, wherein the waste water contains fluorine and organic matter;  
       a water tank upper section which is arranged above a water level of the waste water in the water tank lower section and in which an exhaust gas is introduced and a sludge adhesion section constructed so as to have a water flowability is provided, wherein the exhaust gas contains fluorine and organic matter;  
       a waste water circulator for pumping up the waste water from above the water tank lower section into the water tank upper section and sprinkling the pumped-up waste water on the water tank upper section; and  
       an exhaust gas introducer for introducing an exhaust gas into a space section between the water tank lower section and the water tank upper section.  
     
     
       20. Waste water treatment equipment comprising: 
       a water tank lower section which has a granular calcium carbonate mineral that is stowed so as to flow in an introduced waste water, a stirrer for stirring the waste water and a non-stirring region that is not stirred by this stirrer, wherein the waste water contains fluorine and organic matter;  
       a water tank upper section which is arranged above the water tank lower section and a water level of the waste water introduced into the water tank lower section and which has a sludge adhesion section having an adhesion medium that is constructed so as to have a water flowability;  
       a first waste water circulator for pumping up the waste water containing calcium fluoride in a floc form and a microorganism from the non-stirring region of the water tank lower section and sprinkling the waste water on the sludge adhesion section of the water tank upper section;  
       a second waste water circulator for pumping up the waste water containing the calcium carbonate mineral, the calcium fluoride in the floc form and the microorganism from a stirring region of the water tank lower section and sprinkling the waste water on a portion that belongs to the water tank upper section and is other than the sludge adhesion section; and  
       an exhaust gas introducer for introducing an exhaust gas into a space between the lower section and the upper section, wherein the exhaust gas contains fluorine and organic matter.  
     
     
       21. Waste water treatment equipment as in claim  19 , wherein 
       the stirrer performs stirring by aeration.  
     
     
       22. Waste water treatment equipment as in claim  20 , wherein the stirrer performs stirring by aeration. 
     
     
       23. Waste water treatment equipment comprising: 
       a first water tank and a second water tank,  
       the first water tank in which a waste water is introduced and reserved, the first water tank having a waste water introducer for introducing a reserved waste water into the second water tank, wherein the waste water contains fluorine and organic matter,  
       the second water tank being the waste water treatment equipment claimed in claim  11 ;  
       a third water tank in which the waste water from the second water tank is introduced, the third water tank having a stirrer for stirring the introduced waste water and receiving an aluminum agent put therein;  
       a fourth water tank in which a macromolecular coagulant is put;  
       a fifth water tank in which the waste water from the fourth water tank is introduced, the fifth water tank performing solid-liquid separation of the waste water and discharging separated supernatant liquid;  
       a sixth water tank in which the sludge formed through precipitation in the fifth water tank is introduced, the sixth water tank condensing the sludge through sedimentation;  
       a dehydrator for dehydrating the sludge that is condensed in the sixth water tank and introduced into the dehydrator; and  
       a sludge returner for returning the sludge precipitated in the fifth water tank or the sludge condensed in the sixth water tank to at least one second water tank and the third water tank.  
     
     
       24. Waste water treatment equipment comprising: 
       a first water tank and a second water tank,  
       the first water tank in which a waste water is introduced and reserved, the first water tank having a waste water introducer for introducing a reserved waste water into the second water tank, wherein the waste water contains fluorine and organic matter,  
       the second water tank being the waste water treatment equipment claimed in claim  20 ;  
       a third water tank in which the waste water from the second water tank is introduced, the third water tank having a stirrer for stirring the introduced waste water and receiving an aluminum agent put therein;  
       a fourth water tank in which a macromolecular coagulant is put;  
       a fifth water tank in which the waste water from the fourth water tank is introduced, the fifth water tank performing solid-liquid separation of the waste water and discharging separated supernatant liquid;  
       a sixth water tank in which the sludge formed through precipitation in the fifth water tank is introduced, the sixth water tank condensing the sludge through sedimentation;  
       a dehydrator for dehydrating the sludge that is condensed in the sixth water tank and introduced into the dehydrator; and  
       a sludge returner for returning the sludge precipitated in the fifth water tank or the sludge condensed in the sixth water tank to at least one of the second water tank and the third water tank.  
     
     
       25. Waste water treatment equipment as claimed in claim  19 , wherein 
       the granular calcium carbonate mineral has a particle diameter of 0.1 millimeter to 2.0 millimeters and the upper section does not have plastic fillers and charcoals for propagation of microorganisms.  
     
     
       26. Waste water treatment equipment as claimed in claim  20 , wherein 
       the granular calcium carbonate mineral has a particle diameter of 0.1 millimeter to 2.0 millimeters and the upper section does not have plastic fillers and charcoals for propagation of microorganisms.  
     
     
       27. Waste water treatment equipment as claimed in claim  20 , wherein 
       the sludge to be introduced into the sludge adhesion section is sludge including anaerobic microorganic sludge.  
     
     
       28. Waste water treatment equipment as claimed in claim  23 , wherein 
       the sludge to be introduced into the sludge adhesion section is sludge including anaerobic microorganic sludge.  
     
     
       29. Waste water treatment equipment as claimed in claim  23 , wherein 
       the third water tank includes a sludge fixer for fixing the sludge in the introduced water.  
     
     
       30. Waste water treatment equipment as claimed in claim  23 , wherein 
       slaked lime is put into the third water tank.  
     
     
       31. Waste water treatment equipment as claimed in claim  23 , wherein 
       the aluminum agent put into the third water tank is polychlorinated aluminum.